4 sentences

1. 我为此写了两本书。

   wǒ wèi​cǐ xiě le liǎng běn shū.

   I've written two books on this.

   Source: OpenSubtitles

2. 抱歉，为此把你从床上拖起来。

   bào​qiàn, wèi​cǐ bǎ nǐ cóng chuáng shàng tuō qi​lai.

   I'm sorry to drag you out of bed for this.

   Source: OpenSubtitles

3. 他在工作中表现出色，为此获得了公司的奖励。

   tā zài gōng​zuò zhōng biǎo​xiàn chū​sè, wèi​cǐ huò​dé le gōng​sī de jiǎng​lì.

   He performed excellently at work and received an award from the company for it.

   Source: Dong Chinese Dictionary

4. 我们需要改善环境，为此政府制定了新的法律。

   wǒ​men xū​yào gǎi​shàn huán​jìng, wèi​cǐ zhèng​fǔ zhì​dìng le xīn de fǎ​lǜ.

   We need to improve the environment; to this end, the government has enacted new laws.

   Source: Dong Chinese Dictionary